Cell selecting and switching method and system in relay network

Abstract

The invention discloses a cell selecting and switching method and system in a relay network, used for solving the technical problem of overlong time delay for selecting and switching a cell when a relay station and a user terminal belonging to the relay station perform cell selection and switching in batch under the conditions that the relay station is removed or logged in again and the like. According to the cell selecting and switching method and system disclosed by the invention, by setting selecting and switching identifications, the number of times of signaling interaction negotiated among a service base station or relay station, an anchorage base station or relay station and a user terminal is reduced, thereby reducing the time delay for selection and switching. In the invention, the selecting and switching identifications corresponding to the adjacent base station or relay station other than the anchorage base station or relay station are set to be in an asynchronous or delayed synchronous state, and the inter-cell interference of the adjacent base station or relay station on the user terminal is increased, so that the base station or relay station synchronous with the user terminal in the measurement result of the user terminal is the first choice when the service base station or relay station selects the anchorage base station or relay station, and the probability of wrong selection and switching is reduced.

Description

technical field [0001] The present invention relates to a wireless communication network, in particular to a cell selection and switching method and system based on synchronous setting in a relay network with a relay station (Relay Station, RS). Background technique [0002] In the next-generation broadband wireless communication network, solve indoor coverage models such as subways, tunnels, undergrounds, some temporary application models, mobile vehicles and other application models within the base station (Base Station, BS) range, as well as the user's needs at the edge of the cell. Issues such as coverage and throughput will face severe challenges. [0003] At present, IEEE 802.16j, International Mobile Telecommunications (IMT-Advanced), and WINNER (Wireless World Initiative New Radio) all propose the use of relay stations to solve the problems of user coverage and throughput in the above-mentioned scenarios with coverage defects. . Compared with adding base stations i...

AI Technical Summary

Problems solved by technology

[0004] When a relay station due to adding / removing a relay station in an existing network, adding / removing a relay station on an existing communication path through scanning, environmental listening and ranging, logging in / re-logging in a new relay station, the relay station and all users attached to this relay station All terminals (User Equipment, UE) need to perform cell selection and handover in batches. If each user terminal performs cell selection and handover operations independently according to the current specifications, then the cell selection of user terminals in the relay network will be significantly increased. and switching time

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